Ni iyihe miterere ya hydroxypropyl methyl cellulose na hydroxyethyl cellulose?

1. Hydroxypropyl methyl cellulose

Hydroxypropyl methylcelluloseni ubwoko bwa selulosi bufite umusaruro n'ikoreshwa ryiyongera cyane. Ni eteri ivanze na selulosi itari ioni ikozwe mu ipamba itunganyijwe nyuma yo kuyitunganya, ikoresheje propylene oxide na methyl chloride nk'ikintu gihindura ether, binyuze mu buryo butandukanye. Igipimo cyo kuyihindura muri rusange ni 1.2 ~ 2.0. Imiterere yayo iratandukanye bitewe n'ikigereranyo cy'ibikubiye muri methoxyl n'ibikubiye muri hydroxypropyl.

(1) Hydroxypropyl methylcellulose ishongeshwa byoroshye mu mazi akonje, kandi izahura n'ingorane mu gushonga mu mazi ashyushye. Ariko ubushyuhe bwayo bwo gushonga mu mazi ashyushye buri hejuru cyane ugereranyije n'ubwa methyl cellulose. Gushonga mu mazi akonje nabyo birarushaho kwiyongera ugereranije na methyl cellulose.

(2) (2) Uburemere bwa hydroxypropyl methylcellulose bufitanye isano n'uburemere bwayo bwa molekile, kandi uko uburemere bwa molekile burushaho kuba bwinshi, niko uburemere bwayo burushaho kuba bwinshi. Ubushyuhe nabwo bugira ingaruka ku buremere bwayo, uko ubushyuhe bwiyongera, uburemere bugabanuka. Ariko, ingaruka z'uburemere bwayo bwinshi n'ubushyuhe bwayo ziri hasi ugereranyije n'ubwa methyl cellulose. Umuti wayo uhoraho iyo ubitswe ku bushyuhe bw'icyumba.

(3) Uburyo hydroxypropyl methylcellulose igumana amazi biterwa n'ingano yayo, ubukana bwayo, n'ibindi, kandi igipimo cyo kubika amazi munsi y'ingano imwe y'inyongera kiri hejuru y'icya methyl cellulose.

(4) Hydroxypropyl methylcellulose irahamye kuri aside na alkali, kandi umuti wayo w’amazi urahamye cyane mu rugero rwa pH = 2 ~ 12. Soda ya Caustic na lime amazi ntacyo bigira ku mikorere yayo, ariko alkali ishobora kwihutisha umuvuduko wayo wo gushonga no kongera gato ubushyuhe bwayo. Hydroxypropyl methylcellulose irahamye kuri umunyu usanzwe, ariko iyo ubwinshi bw’umunyu buri hejuru, ubushyuhe bwa hydroxypropyl methylcellulose bukunda kwiyongera.

(5) Hydroxypropyl methylcellulose ishobora kuvangwa na polymer zishongeshwa n'amazi kugira ngo habeho umuti uhuye kandi ufite ubukana bwinshi. Nka polyvinyl alcohol, starch ether, vegetable gum, nibindi.

(6) Hydroxypropyl methylcellulose ifite ubudahangarwa bwiza bwa enzymes kurusha methylcellulose, kandi umuti wayo ntushobora kwangirika cyane na enzymes kurusha methylcellulose.

(7) Uburyo hydroxypropyl methylcellulose ifatana n'imiterere ya mortier buruta ubw'uburyo methylcellulose ifatana.

2. Hydroxyethyl cellulose

Ikozwe mu ipamba itunganyijwe ivugururwa na alkali, kandi ivanze na ethylene oxide nk'ikintu gihindura umwuka iyo hari isopropanol. Ubusanzwe, urwego rwayo rwo kuyisimbura ni 1.5 ~ 2.0. Ifite ubushobozi bwo kunyura mu mazi kandi yoroshye kuyifata.

(1) Hydroxyethyl cellulose irashongesha mu mazi akonje, ariko biragoye kuyishongesha mu mazi ashyushye. Umuti wayo uhoraho ku bushyuhe bwinshi nta gel ikoreshejwe. Ishobora gukoreshwa igihe kirekire ku bushyuhe bwinshi mu mashini, ariko amazi yayo ni make ugereranyije n'aya methyl cellulose.

(2)Hydroxyethyl celluloseIrahamye kuri aside rusange na alkali, kandi alkali ishobora kwihutisha gushonga kwayo no kongera ubukana bwayo gato. Kutambuka kwayo mu mazi ni bibi gato kurusha ibya methyl cellulose na hydroxypropyl methyl cellulose.

(3) Hydroxyethyl cellulose ifite ubushobozi bwiza bwo kurwanya gushonga kwa mortilage, ariko sima yo iratinda igihe kirekire.

(4) Imikorere ya hydroxyethyl cellulose ikorwa na bimwe mu bigo byo mu gihugu iragaragara ko iri hasi ugereranyije n’iya methyl cellulose bitewe n’uko ifite amazi menshi n’umuvu mwinshi.

(5) Indwara y'umuti w'amazi wa hydroxyethyl cellulose irakomeye cyane. Ku bushyuhe bwa dogere selisiyusi 40, indwara ishobora kugaragara mu minsi 3 kugeza kuri 5, ibyo bikagira ingaruka ku mikorere yayo.